{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "Iopentol and iohexol also produced significantly less decrease in aortic blood pressure than metrizoate at the different doses ."}
{"Chemical": ["Iopentol", "iohexol", "metrizoate"], "Disease": []}